td[data-field="play_timer"] button {
  position: relative;
  border: 1px solid #00CA16 !important;
  width: 25px;
  height: 25px;
  background-color: transparent !important;
}

td[data-field="play_timer"] button:before {
  position: absolute;
  left: 8px;
  top: 4px;
  content:'';
  border-left:  12px solid #00CA16;
  border-top: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid transparent;
}

td[data-field="stop_timer"] button {
  position: relative;
  border: 1px solid #E40000 !important;
  width: 25px;
  height: 25px;
  background-color: transparent !important;
}

td[data-field="stop_timer"] button:before {
  width: 6px;
  height: 15px;
  background: #E40000;
  position: absolute;
  content: "";
  top: 4px;
  left: 4px;
}

td[data-field="stop_timer"] button:after {
  width: 6px;
  height: 15px;
  background: #E40000;
  position: absolute;
  content: "";
  top: 4px;
  right: 4px;
}
